possibly the worst and most uncomfortable poo after the "jaggy". Your having a nice plop, and all of a sudden, the phone rings, or the doorbell goes, and the brown rock is halfway out your rectum, and it gets "cut off", leaving the other half hanging out of your black tunnel (anus). It then smudges in your pants, and besides being really uncomfortable, it also makes you stink. (btw its never happened to me!)